"The idea that the President of the United States can show up in South Carolina after nine people in a church had been shot and sing ‘Amazing Grace’, the way he sang ‘Amazing Grace’, was one of the most moving things I've ever seen in my life. I couldn't imagine any other president in the world, in our history, doing that.”
https://www.c-span.org/video/?326769-1/funeral-service-sc-state-senator-clementa-pinckney
http://www.gq-magazine.co.uk/article/george-clooney-obama-suit-syria